SureFire G2L Fire Rescue Single-Output LED Flashlight Virtually indestructible LED emitter regulated to maximize output and runtime Maximum Output 120 Lumens Two 123A Lithium Batteries MIL-STD-810 rated, safe for explosive atmospheres Tough, lightweight Nitrolon body with deep grid pattern for secure grip Tailcap click switch--press for momentary-on, press further to click constant-on